That is a favorite red herring of gun control advocates. The intent of the 2A was to have arms to put down tyrants. Remember Lexington and Concord were partially about seizing the privately owned cannons and powder. Jefferson even declared there should be revolutions now and then to keep liberty vigorous.

Up until 1934 there were NO national prohibitions on ANY arms: cannons, machine guns, fighter aircraft, ships of war, grenades, dynamite, etc